5.15-stable review patch. If anyone has any objections, please let me know.
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From: Konstantin Komarov almaz.alexandrovich@paragon-software.com
commit bfbe5b31caa74ab97f1784fe9ade5f45e0d3de91 upstream.
Reported-by: syzbot+e94d98936a0ed08bde43@syzkaller.appspotmail.com Signed-off-by: Konstantin Komarov almaz.alexandrovich@paragon-software.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ntfs3/fsntfs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/fs/ntfs3/fsntfs.c +++ b/fs/ntfs3/fsntfs.c @@ -2458,10 +2458,12 @@ void mark_as_free_ex(struct ntfs_sb_info { CLST end, i; struct wnd_bitmap *wnd = &sbi->used.bitmap; + bool dirty = false;
down_write_nested(&wnd->rw_lock, BITMAP_MUTEX_CLUSTERS); if (!wnd_is_used(wnd, lcn, len)) { - ntfs_set_state(sbi, NTFS_DIRTY_ERROR); + /* mark volume as dirty out of wnd->rw_lock */ + dirty = true;
end = lcn + len; len = 0; @@ -2493,6 +2495,8 @@ void mark_as_free_ex(struct ntfs_sb_info
out: up_write(&wnd->rw_lock); + if (dirty) + ntfs_set_state(sbi, NTFS_DIRTY_ERROR); }
/*